A "dying star" refers to a star that is nearing the end of its life. It has reached a stage where it can no longer sustain itself, and its light and energy are fading away. Full definition
Black holes that arise from dying stars typically seem to have about 10 times the mass of the sun and heat their surrounding gas to tens of millions of degrees. (discovermagazine.com)
Like dying stars, star employees slowly lose their fire for their jobs. (businessinsider.com)
But until now, they had never gotten a good look at that dusty residue in the vicinity of a massive dying star. (sciencenewsforstudents.org)